signal inversion

For the exactly soluble case of unidirectional ring laser with a homogeneous broadened line, the frequency shift relation, the critical and threshold value of inversion, the phase transition behavior and the features of the two-photon lasers with injected signal are analysed.

就可以精确求解的均匀展宽、单向环形激光器的情形，分析了频率位移关系，反转度的临界值和阈值，相变行为，以及带有外加讯号的双光子激光的特性。

This article introduced X signal gathering different method and the concrete realization, discussed the picture inversion technology in the medicine picture processing function, specifically analyzed the Laplace-transformation, the separate cosine transformation, Hada Masurium transformation and the wavelet transformation.

此外，本文介绍了X线信号采集的不同方法及具体实现，讨论了图像变换技术在医学图像处理中的作用，具体分析了拉普拉斯变换，离散余弦变换，哈达玛变换及小波变换等。

A cross-frequency permutation and inversion ( CFPI) precoding technique is proposed, which transforms signal via additional degrees of frequency freedom.

通过利用频率自由度进行信号变换，提出一种跨频率置换和求反（CFPI）的预编码技术。

The hardware implementation of arbitrary dimension matrix inversion would have more widely application prospect in digital signal processing field.

任意维矩阵求逆的硬件实现在数字信号处理领域将具有广泛的应用前景。